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lbvjy [14]
3 years ago
10

2(2x-4)=3(2x-4) what does x =​

Mathematics
2 answers:
IgorC [24]3 years ago
6 0

Answer:

x = 2.

Step-by-step explanation:

Multiply (2x - 4) by 2 to get (4x - 8). Multiply (2x - 4) by 3 to get (6x - 12). You then get (4x - 8) = (6x - 12). Subtract 4x from both sides of the equation to get -8 = 2x - 12. Add 12 to both sides of the equation to get 4 = 2x. Divide both sides by 2. You then end up with x = 2. Hope this helps!

denis-greek [22]3 years ago
3 0

2(2x-4)=3(2x-4)

Step 1: Distribute 2 to the numbers in the parentheses on the left side. This would be: (2x - 4) only on the left side

(2 × 2x) + (2 × (-4)) = 3 (2x - 4)

4x + ( -8 ) = 3 (2x - 4)

4x -8 = 3 (2x - 4)

Step 2:  Distribute 3 to the numbers in the parentheses on the right side. This would be: (2x - 4) only on the right side

4x -8 = (3 × 2x) + (3 × (-4))

4x -8 = 6x + (-12)

4x -8 = 6x -12

Step 3: Combine like terms

x's go with x's by subtracting 4x to both sides

(4x - 4x) -8 = (6x - 4x) -12

-8 = (6x - 4x) -12

-8 = 2x -12

normal numbers ( -8 and -12) need to be combined. Do this by adding 12 to both sides

(-8 + 12) = 2x + (-12 + 12)

4 = 2x

Step 4: Isolate x by dividing 2 to both sides

\frac{4}{2} =\frac{2x}{2}

2 = x

x = 2

Hope this helped!

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Find the general linear equation (Ax+By+C=0) of a straight line that is horizontal and that passes through (-4,-2)
sukhopar [10]

Equation of line is:

y+2 = 0

Step-by-step explanation:

The slope is defined the rate of change of line w.r.t x. When a line is horizontal. it is parallel to x-axis which means that it's slope is equal to zero.

So the slope intercept form of equation

y = mx+b

become

y = b

Given point is: (-4,-2)

Putting the value of y in equation

b = -2

So the equation will become:

y = -2

It can also be written as:

y+2 = 0

Keywords: Equation of line, slope

Learn more about equation of line at:

  • brainly.com/question/4767370
  • brainly.com/question/4770453

#LearnwithBrainly

5 0
3 years ago
The graph of which functions has an axis of symmetry at x = -1/4?
prisoha [69]

Answer:

2x^2 + x - 1

If I did anything you didn't understand let me know so I can explain.  

Step-by-step explanation:

All of them are quadratics so let's use that.

The first one is 2x^2 + x - 1.  To find the axis of symmetry the strategy is usually to find the two zeroes of a quadratic and pick the number between them.  Something to  notice though is that 2x^2 + x - 1 is just 2x^2 + x sshifted down 1, so they both have the same axis of symmetry.  So I am going to ignore the constant, because then finding the zeroes is much much simpler.  I am going to do this with all opions.

So 2x^2 + x - 1 I am just going to use 2x^2 + x.  If you factor out an x you get x(2x + 1)  So now we have it in factored form and we know the zeroes are 0 and -1/2.  The number directly in between these is -1/4, so the axis of symmetry is x = -1/4.  I don't know if there is only one with that axis of symmetry so i am going to check the rest.

2x^2 - x + 1 means we are only going to look at 2x^2 - x.  factoring we get x(2x - 1) so the zeroes are 0 and 1/2, so the axis of symmetry is at 1/4.

x^2 + 2x - 1 we only use x^2 + 2x.  Factored form is x(x+2) so zeroes are 0 and -2 whichh means axis of symmetry is -1

x^2 - 2x + 1 has the same axis of symmetry as x^2 - 2x, which has zeros at 0 and 2 so the axis of symmetry is at 1.

So yep, it was just the first one.

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